33 Mr Stewart (understandably enough) did not quote any authority to the contrary. I consider that Clerk and Lindsell correctly states the law in this regard.
34 Mr Stewart's submissions essentially were to endeavour to revisit the evidence before the referee to provide a factual matrix for the referee's findings and to rely on the decisions of Hodgson CJ in Eq in Comserv (No 1877) Pty Ltd v Wollongong City Council [2001] NSWSC 302 and Austin J in Micallef v Galea [2001] NSWSC 984.
35 With respect, I do not see anything that was decided in the two cases to which I have just referred as providing any assistance in the instant case.
36 Further, the conclusion of the referee is clear so that there is no need to go behind it. He found that the plaintiff's wall was poorly constructed. However, the cause of its failure was the water and soil putting pressure upon it from the defendants' side of the wall.
37 In these circumstances, Mr Ogborne submits that under the Gartner v Kidman principle the defendants were liable for the water which collected on the defendants' property and which water, together with the soil that was against the plaintiff's wall from the defendants' property forced the wall to a stage where it needed to be demolished.
38 This is, in my view correct. The fact that, had the plaintiff's wall not been inadequately constructed, it would only suffer minor damage, is, in view of the egg-shell skull rule, no answer to the claim for the loss of the whole wall.
39 Thus, the plaintiff, on the referee's findings, is entitled to damages which I will assess later in these reasons.
40 I believe that I can now return to questions 2 and 3 and briefly discuss them. In view of what I have said above, there is no purpose in sending the case back to the referee.
41 I have set out questions 2 and 3 above together with the answers given by the referee. There is no need to repeat them save that it will be remembered that the referee was asked to determine whether certain factors "materially contributed" to the damage suffered by the plaintiff.
42 I believe that the words "materially contribute" in the questions may have been unfortunate. In Chappel v Hart (1998) 195 CLR 232, 244, McHugh J summed up the law by saying:
"Before the defendant will be held responsible for the plaintiff's injury, the plaintiff must prove that the defendant's conduct materially contributed to the plaintiff suffering that injury."
43 That approach appears to have stemmed initially from the words of Lord Reid in Bonnington Castings Ltd v Wardlaw [1956] AC 613, 620. However, it is a refinement that is usually employed in cases where the injury or damage to the plaintiff is brought about by a long process such as in a dust disease case, or alternatively, in medical negligence actions. Outside that sort of case it is unnecessary to refer to "materially contribute" because "The general principle is that in the case of contributory causes each wrongdoer is responsible for the whole damage": Hart and Honore Causation in the Law 2nd ed (Oxford University Press, 1985) at p 205.
44 However, even if one does apply the "materially contribute" test, one must always be aware of what Walsh J said in Duyvelshaff v Cathcart & Ritchie Ltd (1973) 47 ALJR 410, 417:
"The general principle is clear, that the plaintiff must prove, on the balance of probabilities, that the breach of duty caused or materially contributed to his injury … ."
His Honour then quoted Wigley v British Vinegars Ltd [1964] AC 307, 325:
"It is for the plaintiff to prove on a balance of probabilities both that the safety measures would have been effective and that the injured person would have made use of them had they been available."
45 It is important also to remember that Taylor J said in Australian Iron & Steel Ltd v Connell (1959) 102 CLR 522, 531, that it is insufficient to find that a particular matter may have been a factor in causing the damage, the vital question is whether it is probable this was a factor in causing the damage.
46 In March v E & M H Stramare Pty Ltd (1991) 171 CLR 506, 514, Mason CJ said:
" … the law's recognition that concurrent or successive tortious acts may each amount to a cause of the injuries sustained by a plaintiff is reflected in the proposition that it is for the plaintiff to establish that his or her injuries are 'caused or materially contributed to' by the defendant's wrongful conduct … . Generally speaking, that causal connexion is established if it appears that the plaintiff would not have sustained his or her injuries had the defendant not been negligent …".
47 It seems to me, with respect, that the learned referee did not fully appreciate these matters when, having given the reasons that I have set out above, he found that he should answer questions 2 and 3 "No" in each case. However, as I have indicated, this has no consequences.
48 I now turn to the question of damages. The plaintiff seeks $93,172.35 made up of three components, viz:
(i) Cost of repair of wall $25,104.83
(ii) Loss of rental $60,325.02
(iii) Interest on lost rental $ 7,742.50
49 The rental is said to be lost from 16 September 1999 until 1 April 2001, a period of approximately 18 months.
50 There was affidavit evidence from the director of the company that was tenant of the plaintiff's building in September 1999, that the tenant abandoned the premises on 16 September 1999 because of the bulging rear wall and advice from an engineer that work must not be performed within three metres of the wall in case it collapsed and because of continual wetness of the floor.
51 As I have said, the offending wall was at least partially demolished on 27 January 2000. There is no evidence as to why the premises were not restored well before the hearing and relet. I suspect that the reason was that neither party had the wherewithal to rebuild, but if that were so, it is an irrelevant matter at law.
52 Indeed neither party filed any substantial evidence on the quantum of damages at all. Thus, I need do the best I can with the paucity of evidence available. In view of the relatively small amount involved, it would be criminal to prolong the hearing by remitting the issue of damages to a Master.
53 The plaintiff had a duty to mitigate her damage. This meant that in an ideal world, she ought to have repaired the wall at her own expense and relet the premises as soon as practicable. She could then claim the cost of rebuilding and the loss of rental for the interim from the defendants. The good reason that she might reasonably have suspected that the defendants could not afford to reimburse her is not a legal reason for not so acting.
54 Doing the best I can, I would assess that six months from the date of demolition was a reasonable time to restore the wall. Giving a further two months for advertising and for an agent to obtain a new tenant, it would seem to me that the plaintiff should be allowed loss of rent until 1 October 2000.
55 On the plaintiff's figures, to which there has never been objection, this means that the plaintiff is entitled to $40,375.02 under this head. The interest to be added is $6,901.25.
56 Thus there must be a verdict for the plaintiff for $72,381.10.
57 As the defendants have been wholly unsuccessful, I would consider that they should pay the whole of the costs of the proceedings. However, in case the defendants' counsel wishes to be heard on this issue, or in case there was some payment into court, I will direct that this judgment not be entered for seven days within which period, should my Associate be notified, I will extend that stay until I have heard those submissions.
58 The orders of the Court thus are: